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This study aimed to investigate the association of FTO methylation level with type 2 diabetes mellitus (T2DM) in a nested case-control study. This nested case-control study included 287 pairs of T2DM cases and controls identified from a rural Chinese cohort study with a 6-year follow-up. Controls were matched to the cases on a 1:1 basis by age, sex, ethnicity, marital status, and residence. Conditional multivariate logistic regression models were used to calculate odds ratios (ORs) and 95% confidence intervals (CIs) for the association of cytosine guanine (CpG) locus and tag-single nucleotide polymorphisms (Tag-SNPs) with T2DM. Spearman correlation analysis was used to evaluate the association between FTO methylation and possible risk factors for T2DM in the control group. The methylation level on the CpG9 site significantly differs between cases and controls, with a significant association between the CpG9 site methylation and probability of T2DM: OR 2.19 (95%CI: 1.31-3.65) after adjusting for potential confounders. The Tag-SNPs (rs72803657, rs1558902, rs17817449, rs11076023) were not associated with T2DM. Further, FTO methylation was associated with some risk factors for T2DM. A CpG locus of FTO was positively associated with T2DM, but SNPs were not. FTO methylation were also associated with some T2DM risk factors. Further study with a large sample size and data on metabolic product are needed to confirm the association. Copyright © 2021 Elsevier B.V. All rights reserved.

Citation

Shengbing Huang, Pei Qin, Qing Chen, Dongdong Zhang, Cheng Cheng, Chunmei Guo, Quanman Li, Qionggui Zhou, Gang Tian, Ranran Qie, Minghui Han, Xiaoyan Wu, Xingjin Yang, Yifei Feng, Yang Li, Yanyan Zhang, Yuying Wu, Dechen Liu, Jie Lu, Ming Zhang, Yang Zhao, Dongsheng Hu. Association of FTO gene methylation with incident type 2 diabetes mellitus: A nested case-control study. Gene. 2021 Jun 20;786:145585

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PMID: 33753148

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